Verb (used with object), : to odorize natural gas to make leaks detectable.    From Dictionary.com. 

Quick Tip: Be careful not to over-odorize your bedroom, but if smell is a problem consider aromatherapy.    From Wordnik.com.  [Dr. Michael J. Breus: Your Freshman 8 Dorm Room Makeover] Reference

And the shitkeepers in control of AIG allowed their exposure to other people's shitpiles to grow so large that there was no one left to de-odorize.    From Wordnik.com.  [Dealbreaker] Reference